The Palatka daily news. (Palatka, Fla.) 1884-1888, 1887-04-21
THE DAILY NEWS
Bits Of Science.



A new incandescent lamp. manufac-
tured in Austria, is remarkable for the
form and material of its thread and the
method of carbOniZing it. 1t is of clover
leaf shape, is made of MANILA hemp and
is carbonized by bath of mineral oil
The ends of the thread are afterward
galvanized and sOldered to platinum
wires which pass through the bulb; the
ends of these platinum wires are pre-
viously turned spiral-ike by means of "a
very simple machine; the electrolytic de-
posit is copper deposit and the solder
ing is made with silver. For obtaining a
vacuum they resort to Geisler mercury
pump. The vacuum is made in several
lamps at the same time. generally seven,
and they take care to render the threads
incandescent. as usual, during the last
part of this operation. Their duration
~ estimated at | 900 hours.
Careful experiments on the sense of
:mell in dogs have been made by Geo. j.
Romans, who has communicated the re-
suits to the Iinnean Society, of London.
He finds that not only the feet but the
whole body of a man exhale peculiar
or individual odor which dog can rec
OgniZe as that OF his master amidst a
crowd of other persons; that the individ-
ual quality of this OdOr can be recog-
nized at great distances in any direction;
and that even powerful perfumes may
not overcome this odOr. Yet single
sheet of brown paper, when stepped
upon instead of the ground and after
ward removed, was sufficient to prevent
Mr.. Romans dog from following his
trail.
1t is now fairly established that the
common wart, which is so unsightly and
often proliferous on the hands and face.
can be easily removed by small doses of
sulphate magnesia taken internally. NJ.
Colrat, of Lyons, has drawn attention
20 this extraordinary fact. Several chill
siVen treated with three grain doses of
Epson salts, morning and evening, Were
promptly cured. NJ. Aubers cites the
ease of woman whose face was disfig
uYed by these excrescences, and who
was cured in month by dram and a
half of magnesia taken daily. Another
medical man reports case of very large
warts which disappeared in a fortnight
from the daily administration of ten
grains of the salts.
Manufacturers of kerosene oil say that
all lamps are safe with good oil. and that
the quality of oil can be ascertained
by the following test: Take pint tin
saIp, fill il nearly full of water warmed
20 that an ordinary thermometer inn
,inSrxed in it will show 100, pour a small
.quansity of oil in the water, stir it a lit
tle then pass a lighted match quickly
hIt closely over the surface. III pur-
-rhases be made of from three to five
gallons at time. and this test be made
people can protect themselves.
A boiler furnace in combination with
a crate. bridge-wall and smoke chamber
is a newly patented invention. There is
pivotaily suspended rear-plate, provid-
ing the only communication to the
smoke chamber from under the plate,
which latter is provided with a rod for
swinging it rearward An air-chamber
through the base of the furnace COM
municaies with the gas-duct through an
opening directly below and opposite to
the dependent plate, which channel is
furnished with a valve to regulate the
admission of air.
For some time past. says Industry, gas
water has been applied directly to agri-
cultural land as fertilizer, with salts
factory results. An average strength
of about 6 Tw. is employed, and is EN-
ployed, and at this strength gallon of
the water is equal to about one pound
of sulphate of ammonia. The former
will cost about Is per gallons. 1t is APP
plaed to the land from barrel BY means
of 3 pipe drilled with holes. just in the
same way as the streets of large towns
are wafsred. The quantity used is
about 100 gallons per acre.
IN the extensive oyster culture exper-
Iments of the United States Government
particular attention is being given to
methods for preserving the young. Wire
baskets 3 feet square and inches deep
are used for collecting the spat. which
adhere closely to the sides and bottom,
this device enabling the operators to pre-
.ent the accumulation of mud, the great
foe of the oyster industry, by frequent
,shakings of the baskets. An average oy-
ster is expected to yield 10000, 900.
A new snethod of securing veneer to
ats base consists in spreading glue
other adhesive matter between the We
neer and the base, passing the two
cured parts under a heated roller to melt
the glue and cause it to enter the pores
10 the wood. then finally passing the con
neeted base and the veneer under chilled
rollers to harden and set the glue, and
prevent the warping or shrinking of the
Sepeer consequent upon the gradual cool
ing and drying of the glue.